Low voltage area measurement
For 0.5mV threshold, all patients had LVA when the maps were performed in AF, whereas only 52.2% of patients had LVA when the maps were performed in SR. For 0.3mV threshold, 78.2% of patients had LVA in the AF maps, whereas only 43.5% of patients had LVA in the SR maps.
Although global area of maps in AF was smaller compared to maps in SR (267.9 cm2 ±44.5 cm2 vs.285.7 cm2 ±48.2 cm2, p <0.001), areas with reduced voltages were significantly bigger in maps in AF. Specifically, for 0.5mV threshold, mean area of maps in AF was 41.3 cm2 ± 42.5 cm2, while in maps in SR it was 11.7 cm2 ±17.9 cm2, p<0.001. For 0.3mV threshold, mean area of maps in AF was 15.6 cm2 ±22.1 cm2, while it was 6.2 cm2 ±11.5 cm2 in maps in SR, p <0.001.